Ok, I honestly don't even know how to write this or what I'm even trying to ask. My best friend and I just moved in together about a month ago. Several weeks ago she told me about this guy at work that wouldn't stop flirting with her and was engaged. I was pretty blunt when I told her she needed to shut it down. Fast forward to this weekend and she reveals that the guy she's been sleeping with for the past month or two is actually the engaged guy and she's in love with him. They were supposed to end it today but they didn't and instead they decided to spend the whole day at our apartment and cook dinner together. She doesn't want to talk to me about it because she knows how I feel about him and the situation, and frankly I don't want to talk about it either because I'm super uncomfortable with it and I wouldn't even know how. I love her and want to be supportive of her, but this is just so wrong and I don't know how to act around her anymore or what to say.